LA - Leaf Area Index (LAI) and Radiation Measurements
Form: PLA - reduced plot file on LAI measurements
Form introduced: 2009
Last change: 2018
!Sequence; code_country; plot; survey_id; latitude; longitude; code_altitude; slope; exposition; date_measure; date_maxfol; code_determination; lai_max_plot; pai_eff; sai_plot; date_sai; gap_fraction_plot; code_software; code_clumping_method; alpha; gamma; omega_plot; rings; mean_element_width; other_observations
| POSITION | FIELD | DESCRIPTION |
|---|---|---|
| 1 | Sequence |
Description: Continuous number to identify the line of the submitted file Format: I |
| 2 | code_country M K |
Description: ID of the country Format: I Dictionary: d_country |
| 3 | plot (integer) M K |
DB Column: code_plot Description: Observation plot number Remarks: A unique number (per country) given to the permanent plot during the selection or installation Format: I |
| 4 | survey_id (integer) M K |
Description: LAI survey ID Format: I Explanatory Item: 191 Introduced: 2011 |
| 5 | latitude (+DDMMSS) M |
Description: Latitude in Degrees Minutes Seconds (WGS84) Remarks: E.g. ‘+505852’ = 50 Degree, 58 Minutes, 52 Seconds Format: C Explanatory Item: 4 |
| 6 | longitude (+/-DDMMSS) M |
Description: Longitude in Degrees Minutes Seconds (WGS84) Remarks: E.g. ‘+035531’ = 3 Degree, 55 Minutes, 31 Seconds Format: C Explanatory Item: 4 |
| 7 | code_altitude (m) M |
Description: Altitude above sea level in 50 meter classes Format: I Dictionary: d_altitude |
| 8 | slope (degree) M |
Description: Slope of the plot Format: I |
| 9 | exposition (degree) M |
Remarks: 360 degree (North=0) Format: I |
| 10 | date_measure (DDMMYY) M K |
Description: Date of LAI measurement Remarks: E.g. ‘19th July 2012’ = ‘190712’ /// Not Date of SAI measurement Format: Date Introduced: 2011 |
| 11 | date_maxfol (DDMMYY) M |
Description: Date of maximum foliation Remarks: E.g. ‘31st July 2012’ = ‘310712’ Format: Date Explanatory Item: 193 Introduced: 2018 |
| 12 | code_determination (code) M |
Description: Method of determination Format: I Dictionary: d_determination_la |
| 13 | lai_max_plot (m²/m²) |
Description: Plot-representative LAI at the date of maximum foliation, i.e. mean LAI_max_point over all points or sum of LAI_max_species over all species Format: F Explanatory Item: 194 Introduced: 2018 |
| 14 | pai_eff (m²/m²) |
Description: PAIeff at date of LAI mesurement Format: F Introduced: 2018 |
| 15 | sai_plot (m²/m²) |
Description: Stem area index from measurements in the leafless stage in winter (if used in LAImax-calculation), i.e. mean of sai_point over all points Format: F Introduced: 2018 |
| 16 | date_sai (DDMMYY) |
Description: Date of related SAI measurement Remarks: E.g. ‘19th October 2012’ = ‘191012’ /// winter, if applicable Format: Date Explanatory Item: 197 Introduced: 2018 |
| 17 | gap_fraction_plot (%) |
Description: Measured gap fraction - plot representative value Format: F Introduced: 2018 |
| 18 | code_software |
Description: Used software for evaluation of hemispherical photographs Format: I Dictionary: d_software Introduced: 2018 |
| 19 | code_clumping_method |
Description: Method used to derive omega Remarks: Hemispherical photography or TRAC Format: I Dictionary: d_clumping_method Introduced: 2018 |
| 20 | alpha (fraction (0-1)) |
Description: Woody to total plant area ratio used in LAImax calculation Format: F Introduced: 2018 |
| 21 | gamma (fraction (0-1)) |
Description: Needle to shoot area ratio used in clumping correction Remarks: equals 1 in the case of broadleaf tree species Format: F Introduced: 2018 |
| 22 | omega_plot (fraction (0-1)) |
Description: Clumping coefficient used in clumping correction Format: F Introduced: 2018 |
| 23 | rings |
Description: Number of rings for calculation of PAIeff Format: I Introduced: 2018 |
| 24 | mean_element_width (cm) |
Description: Mean element width in cm used for TRAC Format: I Introduced: 2018 |
| 25 | other_observations (FREE TEXT) |
DB Column: other_obs Description: Supplementary comments Format: C |